Virtual Machine Manager DEFINITION: A layer of software that sits between one or more operating systems and a server. It presents each hosted operating environment with the impression that it has its own dedicated server, although in reality a single physical server can simultaneously host multiple OSs.
In a virtual server infrastructure where all resources are shared, optimal performance can only be achieved with an adequate amount of properly allocated resource capacity. Not allocating enough resources can cause critical bottlenecks - leading to performance problems and costly downtime events.
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